HUE PERCEPTION OF NEAR-WHITE LIGHTINGS AT ON AND OFF PLANCKIAN LOCUS OF 6000K CORRELATED COLOR TEMPERATURE

Abstract

This study investigates the Hue perception of near-white lightings after participants' eyes were adapted to 6000K Correlated Color Temperature. In the psychophysical experiment, three different reference lighting settings were used, and they were all 6000K CCTs with +0.015, 0, and -0.015 Duv, respectively. Ten participants assessed the hue perception of 24 test lighting settings per each reference condition. As a result, unique redness-greenness perception roughly follows the orthogonal line to the Planckian locus on the u'v' chromaticity, meaning that the iso-CCT line could be more visually matched if it is calculated based on the u'v' space than CIE uv space. Also, CAM16 worked well estimating lighting hue perception in this study.